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require 'gst'
Gst.init
if ARGV.length != 1
puts "Usage: #{__FILE__} mp3-file"
exit
end
file = ARGV.first
pipeline = Gst::Pipeline.new
filesrc = Gst::ElementFactory.make("filesrc")
filesrc.location = file
pipeline.add(filesrc)
autobin = Gst::Bin.new
cache = Gst::ElementFactory.make("autoplugcache")
cache.signal_connect("cache_empty") do |cache|
$stderr.puts("have cache empty")
pipeline.pause
new_element = autobin.get_by_name("new element")
filesrc.unlink_pads(cache)
cache.unlink_pads(new_element)
autobin.remove(cache)
filesrc.link_pads(new_element)
pipeline.play
$stderr.puts("done with cache_empty")
end
typefind = Gst::ElementFactory.make("typefind")
typefind.signal_connect("have_type") do |typefind, caps|
$stderr.puts("GstPipeline: play have type")
pipeline.pause
cache.unlink_pads(typefind)
autobin.remove(typefind)
osssink = Gst::ElementFactory.make("osssink")
autoplug = Gst::AutoplugFactory.make("staticrender")
unless element = autoplug.to_renderers(caps, osssink)
puts "Could not autoplug, no suitable codecs found..."
exit 1
end
element.name = "new element"
autobin.add(element)
cache.reset = true
cache.link_pads(element)
pipeline.play
end
autobin.add(cache, typefind)
cache.link_pads(typefind)
autobin.add_ghost_pad(cache.get_pad("sink"))
pipeline.add(autobin)
filesrc.link_pads(autobin)
pipeline.play
begin
while pipeline.iterate do end
rescue Interrupt
ensure
# XXX stop the pipeline
exit! # exits all running children (needed)
end
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